Again...spot on. Remove the magnets. Trump likely knows that.
Remember what happened in AZ, when they first passed their apprehension of illegals law? Illegals immediately began leaving AZ...and, many self-deported back to their home countries.
Yep, I remember. And it worked because it was a sane reaction to the presence of large numbers of illegals amongst the population of a well ordered society.
Nearly every country in the world makes immigrating to their countries very painful, which naturally deters that behavior. When that same behavior is actually rewarded, as we've done in the U.S., the predictable human tsunami follows.